public Promise <T> Where(Predicate <T> condition)
{
return(Then(t => {
if (condition(t))
{
return Promises.Resolved(t);
}
else
{
return Promises.Disposed <T>();
}
}));
}
public Promise <U> Select <U>(Func <T, U> selector) where U : class
{
return(Then(t => Promises.Resolved(selector(t))));
}